SOLUTION: What quantity of 75 per cent acid solution must be mixed with a 25 per cent solution to produce 1080 mL of a 50 per cent solution?

Question 706349: What quantity of 75 per cent acid solution must be mixed with a 25 per cent solution to produce 1080 mL of a 50 per cent solution?

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = mL of 75% solution needed
Let = mL of 25% solution needed
given:
(1)
(2)
------------------------------
(2)
(2)
(2)
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)

and
(1)
(1)
540 mL of 75% acid solution must be used
check:
(2)
(2)
(2)
(2)
OK

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